CCTV cameras, or closed-circuit television cameras, are video surveillance cameras that transmit a signal to a specific monitor or set of monitors. They are commonly used for security and surveillance purposes in various settings, such as homes, businesses, and public spaces. CCTV cameras can help deter crime, monitor activities, and provide evidence in case of incidents. If you have specific questions about CCTV cameras or need assistance with choosing or installing one, feel free to ask for more information.